Unquote a type hint

Co-authored-by: Rodrigo Girão Serrão <[email protected]>

src/textual/widgets/_input.py

@@ -52,7 +52,7 @@ def __init__(self, input: Input, cursor_visible: bool) -> None:
 
     def __rich_console__(
         self, console: "Console", options: "ConsoleOptions"
-    ) -> "RichRenderResult":
+    ) -> RichRenderResult:
         input = self.input
         result = input._value
         width = input.content_size.width